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US 6,621,381 B1Granted
TEM-mode dielectric resonator and bandpass filter using the resonator
AssigneeTDK Corporation
InventorsArun Chandra Kundu, Kenji Endou
Life of this patent
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Abstract
A TEM mode λ/4 dielectric resonator includes a rectangular dielectric block having a top planar surface, a bottom planar surface and four side surfaces, a first metal layer coated on the top planar surface, a second metal layer coated on the bottom planar surface, and a third metal layer coated on one of the four side surfaces.
Claims48
A TEM mode quarter wavelength dielectric resonator comprising:
- a rectangular dielectric block having a top planar surface, a bottom planar surface and four side surfaces;
- a first metal layer coated on said top planar surface;
- and
- a second metal layer coated on said bottom planar surface;
- a third metal layer coated on one of said four side surfaces,
- wherein said first metal layer on the top planar surface has a narrow slit for frequency tuning.
3 more elements
A dielectric resonator comprising:
- a rectangular dielectric block having a top planar surface, a bottom planar surface and four side surfaces;
- a first metal layer coated on said top planar surface;
- a second metal layer coated on said bottom planar surface;
- a third metal layer coated on one of said four side surfaces;
- and
- a metal pattern partially formed on the one side surface that is different from said side surface on which said third metal layer is coated,
- wherein said metal pattern has a substantially rectangular shape.
4 more elements
A TEM mode quarter wavelength dielectric resonator comprising:
- a rectangular dielectric block having a top planar surface, a bottom planar surface and four side surfaces;
- a first metal layer coated on said top planar surface;
- a second metal layer coated on said bottom planar surface;
- a third metal layer coated on one of said four side surfaces;
- and
- a metal pattern partially formed on the one side surface that is different from said side surface on which said third metal layer is coated,
- wherein said metal pattern is isolated from said first metal layer coated on the top planar surface and from said second metal layer coated on the bottom planar surface.
4 more elements
A TEM mode quarter wavelength dielectric resonator comprising:
- a rectangular dielectric block having a top planar surface, a bottom planar surface and four side surfaces;
- a first metal layer coated on said top planar surface;
- a second metal layer coated on said bottom planar surface;
- a third metal layer coated on one of said four side surfaces;
- a metal pattern partially formed on the one side surface that is different from said side surface on which said third metal layer is coated;
- and
- an extension part extended from said metal pattern for control of external quality factor, said extension part being provided on said bottom planar surface.
4 more elements
A bandpass filter using a TEM mode dielectric resonator, comprising:
- first and second dielectric resonators each including a dielectric block having a top planar surface, a bottom planar surface, and four side surfaces;
- and
- an evanescent H-mode waveguide coupling section,
- each of said first and second dielectric resonators having first and second metal layers coated on said top planar surface and said bottom planar surface, respectively, and a third metal layer coated on one of said four side surfaces, said side surface on which said third metal layer is coated being a shorted end surface and the remaining side surfaces being open to the air so that each of said first and second dielectric resonators acts as a quarter wavelength dielectric resonator and keeps an independent TEM mode of electromagnetic field,
- said evanescent H-mode waveguide coupling section providing TEM mode coupling between said first and second dielectric resonators by connecting said shorted end surfaces of the respective first and second dielectric resonators so as to act in an evanescent mode with a cutoff frequency higher than each resonant frequency of said first and second dielectric resonators.
2 more elements
Dependencies are inferred from the claim text.